Lock and latch unit



\ Sept. 26, 1933.

w. A. SCOTT Locx AND LATCH UNIT Original Filed Oct. 24, 1928 3 Sheets-Sheet 1 Sept. 26, 1933. w SCQTT 1,928,466

LOCK AND LATCH UNIT Original Filed Oct. 24, 1928 '3 Sheets-Sheet .2

INVENTOR I Wm t. 26, 1933. w. A. sco'r'r 1,928,466

LOCK AND LATCH UNIT Original Filed Oct. 24, 1928 3 Sheets-Sheet 3 INVENTOR a Patented Sept. at, 1933 I 1,928,466 V roe mmmnmm t WillianrAi Scotti Pittsburgh, Pal, assigncr', by

mesneassignments to- (Eorporation, NewlBritain; Conn.

ApplicationOctober 24;

a Renewed January 21, 1932 (oi; W 31);

25: Claims.

Myginvention relates to lockand latch mjeeha+ V nisms,'. and more: particularly to, a key-operated latchrhaving a tubular housing for the latch bolt assembly,v whereby the i latch bolt assembly is ads? located in transverseeandrlateral; bores adjacent tothe edgeofrthe closure, i

Forvexterior' andriiiterioiv doors; suchas out side: doors; ofilce doors-apartment doors, hotel doors andlthej like, it isides'irable to provide akey- 'operated' latch Whioh'wc'an be operated from: the outside;;-and it is. particularly desirable; that the key lockibe: located in the outside:knoh,.for-i11 stance, to assist: in locating thekey holegltis also desirablegtotprovide a locking means operable, fromrthe: inside oi the door: to preventflatoh bolt retractiongexcept with.agpass keylv c t One/object of: invention isto: provide'gan improved lock. having. a tubularhousing for the latchingzrnechanism and having a key-operated 2 mechanism" located in the outside knob". A

Another object of; the inventionis toiinake pr.ovision-so thatthe keyoperated mechanism-will be i accessible without 1 destroying the knob structure;

a Anothenobject is to. make provisiomsothatithe key operated: mechanism: will be accessible to; masterkey thelock; 1 i V 1 erecbjectis to provide amountingj for ylind r in theknob permitting use. ofi longer tc'rnb'l and: springs without using {a "cylindeii of proliibitiveisizeh- I Afuntherobjectxisto provide an anchorplate toacenterzthetlatch b'OlljESSQmbIYlllthE heroes 7 t still further objectis toprovide meansifor" securing. the tubular housing: non-rotatably in the transverse bore, and means-for automatically "alin'ing. the housingwith respect'to theboreswhen'.

inserting thesame in-the transverse bore.

Another object: is to provide aJseIf centering' bolt; head" to prevent binding'in I the. guide plate: l vStill another object-is to-proviclecan improved. knob assembly to c prevent binding of the latch mechanismtfrom. pressure exert'edion the knobs Another object is; to providesimprovedqneans fonjlocking the orossh'ea'd of the latch'bolt.

Other objects and advantages-ofthe invention wilhbexapparcnt' in the: detailed ildescription of certain present preferred" embodiments thereof, which is to follow; taken in: conjunction with' the 50 drawings; 1 i I i In the drawingsgFigure- 1 is a pIan-VieW ofthe lockmechanism located nearthe edge ofthedoor, a portion of the door being shown in sectionand showing the;transverse-andlateral bores; Fig"; 2 is a transverse" sectional view of Fig. '1-, looking towardthe edge oitllie door', Fig; E isa sectional mentwiththe housing 1 are provided withlexe 1,,aztstel The American Hardware' i mason Nol 3.145511 Viewtakenon line Ill -{IL of Fig; 2-;-, Fig. leis an end view of theinternalcams operatediby-the-key 'andke knob; theitubnlar housing being shownin section; Fig isa; sectional view ta-ken on the line V V of Fig.2; Fig.1 Gris-a sectionalviewsimh,

- 'lar toFig; 5; with'the latch boltiretractedby the;

key operatedretraeting; member; Fig, 71s a plan view of the anchor platehaving the tubularhoua- 'ing 7 for the latch mechanism-positionedthereon; Fig; 8-is an endview of the anchor plate; Fig;.--9. is1 afrontelevationalview of the'anehor plate-shown in F '7'; Fig; lfiisiaplan-view oftheylatch bolt; Fi 1.isa sideelevatiqnal view of. the latchbolt; Fig. 1 21s an expanded detail ieW- ofr'a modified form oi a latch bolt; Fig. 13; is aside elevationaof' 1 Fig. 1% is a: fragmentary sectionalvievkrofithe latch; mechanism, showing an modified form-: of" guide plates for the crosslriearcl;Fig. 15 is anend" elevation-ofthe-latch bolt mechanism shown in Fig; v -t-; Fig-. 1 isa detailendeview of a modified; form of. outsideknob camgplater I i c Thehousingl is preferably oftubular or-cy1indrical form havingsaichamberi open at eachends- End pieces 3 and &- ha-ving screwthreadengagee 8 ternally threaded-hubs fraud 6. Thehubba iorm a-bearing'ior thesstemor shank 70f Cthe-o11tsideknob-8i A cam p1ate 9 is seoured'to the-innen endofthe=knob;stem,-7 as by the-screws, ;10: :The; center: of v the knob :stem] is bored I to: receive the r stem 11 ofan internal ca' niplate- 12; A boss in the stem l abuts? against the end of the =hub-3y as at 18. The bOTE QflJhQSEGID." 7 communicates: withthehollowed;,ont'portion-oftheknob 8-, Figs 2;- i t A disc l3:is'seated"inp an annulan recess' l iin theface of theoutside'knob-fii Afkey'operatedi cylindrical 1001015,.ofanysuitabletype;is eccen tricallysecuredtothadisclBi and-is positionedin; the hollow portion oftheknob 8 when; the disc 13- is fittedintheannular recessl l-- .The disc 13 and; a the eccentrically mountedlock aresecurelyi'heldl g in position from the; inside, of thetubular housing 1 by, the screws ldextending through theknob stein '7" and threaded into the rear end 'of tl1e. lockcylinder, Thebarrel ofthe cylindrical lock 7 is provided" with a, tongue whichaisyadapted to engage'a suitable groove in the end'jof thecam stem" 11, to impart arotatable'movem'ent tothe cam 12'whenthe-barrel of thefloclcis turned by; the'key 17,-to retract a latch bolt} H F The hub d serves as"a* bearingfor -the inside knob spindle 19, which i is providedwith a boss} '20' that abuts against the end of the--hub. *Thef o inside knob 21 has screwthreaded engagement} t 40 damage to the crosshead.

with, or is otherwise secured to a reduced end of the knob spindle 19. An inside cam plate 22 is secured to the knob spindle, as by the screws 23, to retract the latch bolt when rotated by rotation of the inside knob.

A crosshead 24 is positioned in the chamber 2 of the housing 1 between guide plates 25 and 26 that are slidably supported in parallel grooves 27 in the side wall of the housing 1, Figs. 4 and 5. A stud 28 is centrally secured to and projects through the crosshead 24. The backwardly projecting end of the stud 28 serves as a guide for one end of the crosshead spring 29, the other end of the spring being seated in a recess 30 in the housing 1. The stud 28 extends toward the free edge of thedoor and is slidably supported in an opening through the forward wall of the housing 1. I

' One end of the crosshead 24, under pressure of the crosshead spring 29,nor1nally rests against the ends of arcuate lug or cam 32 inwardly projecting from the cam plate 22 (Fig. 5). The opposite end of the crosshead 24 rests against the ,cam 33, and against theends of the arcuate cam "34, inwardly projecting from the cam plates 12 and 9 respectively. A latch bolt 35 having a threaded-stem 36 is screwed intothe end of the stud 28.

The latch bolt the inside knob 21, the outside knob 8 or by the key operated lock 15, as shown in Fig. 6. By inserting the key 1'7 into the lock 15, the barrel of the'lock may be turned and the stem 11 rotated. The cam 33 on the cam plate 12 forces the crosshead 24 back against the pressure of the end of the stud 28 serves as a stop by abutting against the side wall of the housing, to prevent A transverse bore 38 and a lateral bore 37 are provided adjacent to the free edge of the door D; The lateral bore extends from the edge of the door inwardly to meet the transverse bore. An anchor plate 39 is provided with a tubular projection 40'which enters and fits snugly in the latch bolt bore 37, (Figs. '7, 8 and 9). Tongues 41 ,one on either side of the anchor plate 39, slide into co-operating grooves 42 in the tubular housing'l which prevents the housing from turn- 7 ing in the transverse bore 38. The stud or sleeve 28 of the crosshead is positioned vertically in the center of the latch bolt bore'37. Two radially projecting'lugs 43 on one end of the anchor ,3 plate 39 serve as a stop for the tubular housing 1,

bringing the stud 28 of the crosshead 24 laterally in the center of the latch bolt bore 37. An angularly shaped wedge 44 is driven into a groove 45 in the housing 1 opposite the anchor plate, be-

66 ;tweenthe housing 1 and side of the bore 38, forcing the housing 1 forward into the anchor plate.

Thus,the housing 1 is non-rotatably and securely centered in thebores 3'7 and 38.

CA Y.

A .latch'bolt guide plug 46 is secured in the o'uter end of the bore 37., flush with the edge of "a pin 49 passing therethrough, (Figs. 10,and 11).

The pin is adapted to pass freely through an eye in oneend of the bolt screw 36, permitting a vertical and lateral movement of the bolt head on .the bolt screw, to prevent binding of the bolt ea i tg defi i bo s 36am 3? a e n t.

" knob 8" against bolt retracting movement.

35 maybe retractedby rotating 28 projecting into the lateral bore 37.

wedge key 44 is driven in the groove 45 between correctly alined or if the housing 1 is keyed at an angle.

Figs. 12 and 13 illustrate another form for accomplishing the same result. A bolt stem 36a is provided with radial lugs 50 adapted to engage co-operating radial slots 51 in a screw plug 52 which loosely fits over the end of the bolt stem with abutting engagement of the slots 51 and the lugs 50. The screw 52 is threaded into the bolt head, thus providing a floating or universal connection between bolt head and bolt screw.

, Referring to Figs. 4 and 5, the top and bottom edges of the cam plate 9 are flattened to permit engagement with the guide plate 25 when the guide plate is moved back and over the flattened edge of the cam plate, thus locking the outside The guide plate25 is provided with an integral rod 53 which is bent upwardly and outwardly, and is slidably supported'in a groove in the wall of housing 1 (Fig. 2). A push button 54 is secured to the outer end of the rod 53. The lower guide plate 26 is similar to the guide plate 25, except itis not adapted for a locking movement. In case of accidental error in the assembly of the lock,.having-the push button lock under the knob, all that is necessary is to reverse the positions of the guide plates 25 and 26 so that the push button and guide will be above the knob, it being the preferred position of the push button locking means. The guide plate 25 is providedwith a retaining spring 55 adapted to enter indentures in the housing 1, to retain the push button in locked or unlocked position. Figs. 14, 15 and 16 illustrate a modified form of guide plate and locking means. The lugs 56 on the crosshead guide plates 57 and 58 are slidably dove-tailed in diametrically opposite grooves in the housing 1. The lug 56 of the guide plate 58 is provided with an outwardly extending pin or rod 59 which supports a push button 60. The inner end of the lug 56 is adapted to engage one of the grooves 61 diametrically opposite'in the edge of the cam plate 62. The lug 56 of the guide plate '58 is provided with a spring and pin inset 63 which co-operateswith apertures 64 in the housing 1 to retain the locking pin 59 in look or unlock position. With the locking pin 59 in the pulled-out position, the latch bolt is adapted to be operated by the outside knob. Pushing button in the lock position, the inner end of thelug 56 engages the groove 61 in the cam plate 62 thereby preventing bolt retracting movement of the outside knob. The locking button 60 is preferably located above the inside knob. In case of error in assembly the guide plates 57 and 58 are transposed to correctly position the locking button. The guide plate 57 serves merely as a guide plate and is not provided with a locking pin.

Referring again to Figs. 1 and 2, the anchor plate 39 is positioned so that the tubular projection 40 fits into the bore 37. The housing 1 having the outside knob 8 pre-assembled there to, the assembly including a rosette 65 having a threaded ring 66 threaded onto the hub 5 is inserted in the transverse bore 38 with the stud The the housing and the side of the bore, thereby securing the housing.

The inside rosette 67, provided with a passageway for the projecting rod 53 of the guide plate and locking means 25, is placed over the end,

of -protruding'- hub :6. A 'threaded==ring 68 l is threaded on the" hub'6 to'secure' the rosette 67" between-the ringrzandthe side'of the door. The outside ring 66 is tightened to secure the rosette between the ringland the side of the door. The rosettes '65-'and--67 completely enclose the aperture 38 on"either side and may beof any desiredshape or design. The push button5 l is secured totherrod53 .for push and pullmovement to' the locking guide: plate.

Latch "bolt 35'has its stem ,36 threaded-int0 the stud 28 of the crosshead224, the head of the latch bolt protruding through the guide plug 46,

that closes the-lateral bore '37. t

will be apparent from the'foregoing description, andvarious modifications may be. made without departing from the scope of the appended-claims.- I claim as my-invention:- I U 1. -Aplatch mechanism comprising a'housing having aremovable end- -hub'at each end, alatch bolt-slidably mounted in said housing, aknob mounted in each of the said hubs, means-operably connecting each of the said knobs and said latch bolt to retract said latch bolt independently, and each knob being provided with a shoulder adapted to abut against an endsurface of one of said'hubs, and said connecting means abutting against the other end surface of said hub to maintain said knob inposition therein. 1 V

2. A latch mechanism comprising a tubular housing having a hub piece at eachencba latch bolt slidably mounted in'said housing'and having a cross head, guide plates for said crosshead, one of said plates being mounted in grooves in the side wall of said housing, a knob mounted on said housing, means operably connecting said knob and said crosshead, to retract said latch bolt, and-means for moving said guide plate to engagesaid connecting means and'lockth'e" same against retractive movement,

3. A latch-mechanism comprising a tubular housinghaving a hub at each end; a latch bolt slidably mountedin said housing and having .a crosshead, a guide plate for thecrosshead slidablymounted inthe said housing, a knob journalled'inone of said hubs, a cam plate connected to said knob and operatively connecting said knob and said cro'sshead, whereby rotation of said knob will retract said latch bolt, and a proiecting lug on said guide plate for engaging said cam plate to lock the knob against bolt-'retracting movement.

4.-. The combination with a closure having trans verse and lateral bores adjacent to the free edge thereof; of a housing adapted to be installed in said transverse bore, and a key member engaging a wall of the transverse bore and the housing,

for non-rotatably securing said housing in said transverse bore. I

5. The combination with 'a closure having transverse and lateral bores adjacent to the free edge thereof, of ahousing adapted to be installed in said transverse bore, a connecting member extending through the side of said housing for a bolt connection and, protruding into said lateral bore, and means vertically and horizontally aligning the said connecting member and the said 1 lateral bore.

6. The combination with a closure having transverse and lateral bores adjacent to the free I edge thereof, of a tubular housing adapted to be installed in said transverse bore, a latch bolt member extending through the sideof said hous- The operation and assembly 1 of 1 my invention betweenv ing and protruding into-said lateral bore, an anchorfplate having'a tubular projection fitting in sai'dlateralbore, and-tongues, one on either side of thesaid anchorplategJco-actingwith the grooves in the said housing-, for verticallyaligning the housing-andthe said' lateral bore.-

'7. The combination with a closure-having transverse andlateral bo'resadjacent' to the free edge thereof, of a housing adapted tobe installed in said transverse bore, a transversely extending latch bolt member carried bysaid housing and protruding into said lateral bore, an anchor plate having a tubular projection fitting in said'lateral bore' and radial lugs on oneendofsaid-anchor plate -and abutting against the housing, to laterally align the said'housing and the's aid lateral borep 8. The combination with a closure having transverseand lateral-bores adjacent to thefree edge thereof, of a housing adapted to-be installed in said transverse bore; atransversely-extending stud carried by said housing for a bolt connection andprotruding intolsaid lateral bore, an

anchor platehaving a projection fitting inlsaid the bolt inadvanced position, and anladjustable 1 stop member carried bythe crosshead forilimiting retractive movement thereof.

11.A.13,tCh structure'comprising a latch bolt,

a crossheadconnected-to said bolt, a coil spring 1 seated rearwardly of said crosshead and normally serving to hold the samein' advanced position,

and a stud carried by the cross head and extending into said spring.

12. The combination witha housing having a hubportion atone end anda latch mechanism carriedtherein, of a knob having a reduced por tion journalledin said hubportion, the reduced portion of saidknob being'substantially coextensive with the. hubportion of said housingsand means carried'by said knob for actuating'said latch mechanism, said means serving to prevent longitudinal movements of said knob in said hub.

13, The combination with a housing having a hub portion at one end and a latch mechanism carried therein, of a knob journalled in said hub portion, a shoulder abutting against the outer end of said hub, and means secured to the inner 'end of said knob for actuating said latch mechanism, said means abutting against the inner end of said hub to maintain said knob in assembled relation therewith.

l4. Latch structure comprising a housing having latch mechanism contained therein, a knob having a shoulder and mountedin said housing with the said shoulder abutting against the housing, and a plate secured to the inner end of the knob in position to retain the knob in assembled relation with the housing, said plate having operative connections for actuating said meoha nism.

.15. Latch structure comprising a housing having latch mechanism contained therein, a knob having a shoulder and, mounted in: said housing with the said shoulder abutting against. the hous-, ing, a plate having operative connections with said mechanism, and means for securing said plate to said knob in position to retain the knob in assembled relation with the housing.

16. Latch mechanism comprising a housing having a hub at one end, a latch bolt slidably mounted in said housing and having a crosshead, a knob rotatably mounted in said hub and having a shoulder abutting the outer end of said hub to prevent inward axial movements thereof, means operatively connecting said knob and said crosshead, and positioned to abut against the inner end of said hub to prevent outward axial movements of said knob, and means for securing said connecting means to said knob.

17. Latch structure, comprising a casing, bolt mechanism reciprocable with respect to the easing, a spindle, retracting means connected with the spindle for retracting the bolt mechanism, said retracting means comprisinga gen-.

erally circular member having a relatively flat portion at its periphery, and a slide adapted to cooperate with the relatively flat portion of said retracting means to prevent operation of the same. V

l8. Latch structure, comprising acasingfloolt mechanism reciprocable with respect to the casing, a spindle, retracting means connected with the spindle for retracting the bolt mechanism, said retracting means having a flattened'portion, and a slide extending into the casing and having a portion adapted to cooperate with said flattened portion of the retracting means to prevent operation of the same.

19. Latch structure, comprising a casing, bolt mechanism reciprocable with respect to the casing, a spindle, concentric key operable and knob operable retracting means extending into the casing at one side and adapted to retract the bolt mechanism, and a slide eccentric to said spindle extending into the casing at the opposite side and adapted to cooperate with the knob operable retracting means to prevent operation of the same.

20. Latch structure, comprising a casing, bolt mechanism reciprocable with respect to the casing, a hollow knob and knob spindle, knob operable retracting means connected therewith and adapted to retract the bolt mechanism, and key operable retracting means within the hollow knob and knob spindle and adapted to retract the bolt mechanism, said key operable retracting means comprising a plurality of parts insertable into the hollow knob and knob spindle from opposite directions and cooperatively engaging to rotate together. i

21. Latch structure, comprising a casing, bolt mechanism reciprocable with respect to the casing, rotatable retracting means for retracting the bolt mechanism, said retracting means having a flattened portion at its periphery, and a slide having a portion adapted for movement to a position opposite said flattened portion of the retracting means to prevent operation of the retracting means.

22. Latch structure, comprising a casing, bolt mechanism reciprocable with respect to the casing, a divided spindle having opposite portions on opposite sides of and separated byv the bolt mechanism, each of said spindle portions having means for retracting the bolt mechanism, and a slide extending into the casing and adapted to cooperate with at least one of said spindle portions to prevent operation thereof, said slide being eccentric to said last mentioned spindle portion.

23. Latch structure, comprising a casing, bolt mechanism reciprocable with respect to the casing, retracting means for the bolt mechanism, a slide extendable into the casing and having locking means thereon, said slide lying adjacent the casing wall and being disposed laterally of the path of the bolt mechanism, and guide means in the casing embracing said slide on all four sides and retaining the same in place.

'24. Latch structure, comprising a casing, bolt mechanism reciprocable with respect to the casing, retracting means for the bolt mechanism, guide means at opposite sides of the casing and disposed laterally of the path of the bolt mechanism, a slide extendable into the casing and selectively cooperable with either of said guide means so as to lie generally parallel and in proximity to the casing wall, and locking means on said slide.

25. Latch structure, comprising a casing, bolt mechanism reciprocable with respect to the casing, a spindle member having its body disposed generally laterally of the bolt mechanism but having connected therewith means extending into the path of the bolt mechanism for operating the same, and slide means extending into the casing and adapted for movement to a position to prevent operation of the bolt mechanism by the spindle member, said slide means being eccentric to said spindle member? WILLIAM A. SCOTT. 

